Rock-crusher



J. F. BETCHKAW.

ROCK CRUSHER.

APPLICATION FILED MAY 22. 1919.

Patented Nov. 8, 1921.

SHEETS-SHEET v m-ran -;sTATE 1 P'ATENT- OFFICE.

AMES r. "'Bn'ro xA'w; or BERLIN; Wisconsin; essierron mo 'rn la r race.jswrron a MANUFACTURING COMPANY, or cenusrr; PENNSYLVANLLYACORBORA'IION To alley/m concern Be it known that 'I, JAMES F. BnToHKAW,a citizen of the' 'United States, residing at Berlin, in the county ofGreen Lake and State ofWisconsin, have invented a certain 7 new :and"useful Improvement in Rock 'Crushers,"of which the following isua full,

clear, concise, and

'ed' on power.

exact description, "reference' being had to the accompanying drawings,forminga' part of thls'specificatlon, i

means for locking the mantle to the gymtory head of the .'.crusher, aswill be more apparent from the following description;

' In the classofrock crushersor breakers t0 which my' invention hasparticular reference,,'there is head disposed in a cooperating conicalcrushing chamber,into which the unbroken rock;

is fed. The 'gyrating conical head is mounts'haft which is actuatedby aneccentric or similar mechanical device to gyrate the head throughacircularpath in tween the conicallsu rfaces of 'the head and chamber;This. operation is, naturallyfpro ductive' ofsevereerosion 'of'thecrushing the mantle torthe headfthe primaryobject surfaces, particularlythe surfaceof the gy ratory head: when-crushing hard rock andconsequently I? this head inust be" freqi'ientl y renewed, a e e As asaving expedient to avoid the expense and has been proposed toapplyaJmantle of extremely hardmetal'to the "head, such as one(if-manganese steel, which could be renewed With relatively smallexpense and little 'difliwas encoun culty. At this point a f problemtered in the method of looking or securing head. I

1 the improved anclsimplifi'ed means for securing employed a gyratingconical difliculty of renewing the entire headfit I the upper; end

age invent/M1151 have provided,

to the lo'wer' end of the-shaft 5 which will produce a {circulargyratory' motion of the Specification of Letters l -Pfatentid N617;1921'. 1 Apiilicaitionfiledlhzy 22, 1919'. Seria1No."2918,8 80.'

strength to the crushing unit.

bodying features \vith'the above "locking means] I 7 In the'appendedFolrawingsI have illustrated a preferredembodiment of inventionappliedtoa gyratory rock crusher, but

i 'from the utility o'f-my'inventiomwhich will My lnvention relatesgenerally 'to rock, CI'HSliGIS, and more specifically to improved bemore apparent asfthe description "pro ceeds, it will be obvious that myinvention is not 'limi tedsolely to this particular use, but includes inits general. I I

Figure 1 is-a verticals'ectional view of a gyrator-y crusher embodying'a head constructed in accordance with my invention; ig. 2 is a planview ofthe'jhead in its entirety, part in section; I 1 I Fig. '3 isanenlarged'section ofjthe same taken on theline 3+3'of Fig. 2; thecrusher chamber and break the "rocks beig. 4 is' a" bottom plan view ofthe head away in section and} v c V Fig; 5 is a fragmentary sectionalview taken .on the planeiof'the line 5 5 of Fig.4. The crusher lflvhichlshall describe but briefly, includes conical crushing chamber 2,afeeding hopper 3, which'opens into the top of the crushing chamber, anda discharge spout 4L'which' discharges the crushed rock from the bottomof the cha-mber 2. Supported vertically in the machine is a shaft '5, ofwhich is loosely guided in a 'play bearingfi in thehub of the spider 7,and the lower 'end -of which is mounted in an eccentric part of endofthe j'pow'er"s'ha'ft12. -On the shaft-5 is mounted the "conicalcrushing heacl'14, the

2, forms a {tapering restricted throat in the bottomlof-the chamber2,where theactual rockbreaking is accomplished.

It will be'apparent'thatrotation ofthe eccentric 8 'will impart agyratory motion V scope other classes of machinery and alsotoolmechanism in f-the same being broken away 8glfThe' eccentric 8 formsthe'hub of a bevel gear 91' which is driven by'a bevel pinion l1mountedon the i, chamber .2, th

' prises in its entirety,

' erably f cast is forme'd with formation, ."as indicated at 22, zAfter;mounting the head centeron the shaft, the' head 4 about the interior orthe throat l5, with a reversely'rotating motionof the head 14 about itsgyrating axis, This action re? I sults in breaking thematerial in thecrush ing chamber, which then drops through'by a continuousfaction atthe successive places around the throat from which the 'headis' mostdistant. v Obviously, this breaking action causes severe erosion of: thebreaking surfaces. which, particularly when breaking eXcep-f tionallyhard rock, necessitates their periodic renewal. In the case of thecrushing is is accomplished by inserting.

new liners or "concaves- 16, which form a sectional lining for. thechamber 2. T-he. crushing surfaceof the'head 14 is renewed bysubstituting a newmzintle. onthe'head center, whichwill be more apparentfrom the shectional illustration of the head shown in -1g..;

Referringto this figure, the head '14 comahead center 17 ,J prefmm orsteel, and a conical;

mantle 18'of manganese steel or some" other extremity hard metal.-

The head center 17 surfaces 19 and 21, which are ma'chinedofl' withafslight taper tow fit the taperfofthe shaft 5. The interior portion ofthe casting j intermediate" the bearinglsurfaces, is spaced.

away from 'theshaft and is of polygonal intervening central spacebetweenv the two j is 'filled with a filler of :zinc, babbitt, or anyspace 22,.through the semi-circular grooves- 23 in the, top of theheadcenter. The zinc or Babbitt filler constitutes: a backingifor" 7 thatpart -away from, the shaft, and'hence. forms 7 solid unit of the shaftand-centen f ;The.head' 1 center] may also be keyedito' the. shaft ifde- The outer with alternate. i slots and; segments, :the' seg' ments.--being i,ndicated-T at 26' and 27;," rin preferred material, which ispoured intothe of the head center which is spaced sired..

center'l'i ismachined adjacent thej top and bottom to provide: thetapering --centering surfaces '24-and25; [The outermantle 18 onthe headcenter-l'z'by shoul- 'der's26anda t .thebo'dy of themantle'jandbearon-fthe sur faces 24; and 25.' The shoulders 26 and 27 a;are machined on a common taper. andare centered 27 which projectinwardly from made segmental; that;.;is,: t hey are fashioned YFigs.;2"-and fie The shoulders 26. and, 27

- befilled. byafiller29 amine, .babbittj, ce-QI ment "or I any othersuitable material, which 7 1 form an; intervening-space 28 .fbetween themantle and head center,=;which is adapted to.

may ,be inserted betweenthe -'mantle and; head center in moltenorplastic-con'ditionn these, howeyer, I preferably employ the. twointerior end bearing,

tapering surface of the head [pouredbetween i zinc. Nhen. the head hasbeen assembled,

the molten filler 28 from thejtop of the head, between the segments 26and the level lofffthe'filler'is brought up flush with, the. top *oi'thhead, The filler permeatesin'to the "slots" theiupper-andlower segments26 and and'up'onsolidifying, the mantle 18 and filler 29 are rigidlylocked together; v j. g r

' Itlwill-be apparent from the foregoing that the machiningoperationsnecessaryto 1 r provide for properly centering the mantle 29 is pouredinto the space between p .18 .on thehead center 17 are yeryirmu'chjsim-gplifiedgby, machiningionlyjthe surfaces 2 1 and ".and theshoulders '26.and27'.- :'.T:he-.

span

between. the shoulders 26 an'df27 gisf backed up by the filler 29,whichthusg-faf- 1. fords the desired solidity andy st'rength to the crushinghead; The filler furthermoref prevents the. entrance of pu'lverulentrock; between the mantleand head centerandl thus: 7 avoids the abrasionbetween these: two which,

characterizes thegun lock-typeof'joint.

The filler29 -issecurelyllocked to, the head v center17"by.-thefollowingieonstruction. Re-

ferring toFigs. 3 and 5,-itvwill beinoted that the upper? end ofthehead-center '17is pro-g vided withaan annular" recess or groove 31 whichhas an inwardly and downwardly nk clined face onsurfaQe-BQ. It will beappar-..

ent-that the fac'e .;82,-beinginclinedratan an- 11 gle placement underthe stress of axial; tending to raise the head or 'mantlei forces,

entire "head 14' is 7 v p p crusher in mannerc'well known t'oj thoseskilled in the by a. chisel oifthe: like,

tween 17 an'd therefore this can be ,easily' accome a new chargeOfiIilQlfiQIlfiller '29 is Iofi course;

the, mantleflnd head center together. jltewilkgbe 'noted that theface ofthemantle' l8 i's' firedhackg V opposite the 4 groove 31,. asindicated;at 33,

to "permit ,access togthe groove 31 revamp, 12o

to lock the "two ping or cutting outnthe filler, I .i

Whenj it isdes'ired to 'removethe-.-mantlei S -fo'r to the line ofseparation-oftheyfiller 29 and head center 17-, will function as awedgeto lock the filler29-. against upwardidis-E;

nlished Afteixsubstitiiting the.;new rnantle I .f

To prevent any relatiyeirotation between the. mantle ,(18: "and 1 head}center; 'vide "two ldiar'n'etricallyl opposite at. Rkeys- 7 g.engage'sbetweefn segmen mantle '18 and are rec V ter 17 where they areiheld in: place by 'set screws 35:1. The :maritl'e 18 :also provided jdiametrically. j pposite .holes 36" essed in thehead cen-f I lifted fromthe'interior formation,

(Fig, 3), whichare adapted to" be engaged y grappling pins when the headis to be of the crusher. The locking feature of my invention is not tobe limited to the groove shown, asit will be obvious thatI may employrecesses or projections of any i so long asthey present a face orsurface disposed at an angle to the line of seperationof the'mangle18and core member 1.7. a recess or either the ber 17, or

a projection, top or bottom of the core memin-anyposition'where it Wlllbe accessible 'tO-PGHIlll'J of removal of-the filler. 4 r I claim:

1. In combination, a central'member of ing over said central member,said conical mantle being adapted to be withdrawn endwis'e off the endofsaid central'member, a locking surface on 'said'central memberdisposed at an angle to thevline o'f separation of said mantle and saidcentral member, a cooperating locking surface of separation of saidmantle and said oember, releasable locking means bers comprising afiller tral member, a locking filler between said central member andsaid mantle and engaging with both of said surfaces, said surfaces beingarranged whereby the engagement of the filler therewith positivelylocksthe conical mantle against endwise withdrawal, one

of said surfaces being. accessibly disposed to permit thereleasmg ofsaidlocking filler therefrom.

2. In combination, an inne'r' member, an-

outer member engaging over said inner member, said 'outer member beingadapted for removal over the endof said inner memfor said memlockingsurfaces being arranged whereby the filler is positively locked againstend- Wise removal from said inner member, and

whereby said outer member is positively" particular form of,

This angular surface, whether it be.

may be disposed at groove and thereby conical mantle .engag-V on saidconical mantle also disposed at an angle to the line top and bottom ofsaid headbetween, said 7 H members, lockmg surfaces on 'each of sand,

- members cooperating with said filler, said .between said .head

' shoulders. one of said locking surfaces being acand outer members be-7 ing locked together solely by the cooperation of said-filler-and' saidlocking surfaces.

' 3. In a gyratory crusher, the combination of a gyratory shaft, aconical head center mounted on said shaft, said head center havingmachined surfaces adjacent the'top and bottom thereof, a removableconical mantle on said centerjhaving inwardly-projecting shouldersbearing on said machined surfaces, a metallic filler between said headcenter and said mantle, an annular locking groove formed in the upperend of said head center, said filler being molded in said rigidlylocking said filler against endwise removal over the reduced end ofsaidhead center, saidconical mantle being rigidly locked to said fillerto prevent endwise removal over the reduced end of said 'filler, saidlocking groove being accessibly disposed to permit said filler to bechipped out around said groove, and a key between said head center andsaid mantle f between.

or preventing relative rotation therer 4. Ina crusher head, a conicalhead center, a removably conical mantle on said head center, anannulargroove formed in said head center, said groove having a surface inclinedinwardly at an angle to the line of separation of said mantle andheadcenter, and a metallic filler molded in said groove, said filler havingrigid engagement with said mantle, said groove being accessibly disposedto permit removal of said filler.

5. In a gyratory crusher, a crusher head comprising a conical headcenterhaving annularly machined surfaces center, aremovable conical mantle onsaidhead center having inwardly pro ecting shoulders bear mg on saidmachined surfaces, a groove formed in said head center adjacent the topthereof, said groove having an inwardly inclined wedging surface, and ametallic filler center and said mantle adjacent the and molded in saidgroove, one of said shoulders being segmental to permit access of saidfiller to the space between said In witness whereof I hereunto subscribemy name this first day of'May, 1919.

J F. BETCHKAW.

ioo

